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H. G. VOIGHT.

LOCK. 7 APPLICATION FILED SEPT. 17; 1917- 1,308,459, Patented July 1, 1919.

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H. G'. vmsmr LOCK.

APPLICATION FILED SEPT. 11. m1.

1,308,459. Patented July 1, 1919.

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- ze 6 5s 40 29 N 9 55 15 6 5 E w T 7 42 a 41 g3 52 g 58 THE COLUMBIA PLANocinAPrLcm, WASHINGTON; n..c.

UNITED STATES PATENT OFFICE.

HENRY G. VOIGHT, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO SARGENT 6:

COMPANY, OF CUT.

NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTI- LOCK.

Specification of Letters Patent.

Patented July 1, 1919.

Original application filed June 12, 1916, Serial No. 103,250. Divided and this application filed September 17, 1917. Serial No. 191,781.

To all whom it may concern:

Be it known that I, HENRY G. VOIGHT, a citizen of the United States, residing in New Britain, county of Hartford, and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to looks and it has special reference to cylinder locks used in connection with mortise door looks. The invention also relates particularly to master keyed cylinder locks which are especially intended for use on the corridor doors of hotels, as disclosed in Letters Patent Number 1,244,264: granted to Sargent & Company on October 23, 1917, as my assignee.

One of the primary objects of the invention is to provide a lock in which a cylinder having a rollback or'cam arm radially movable on the key plug is adapted to operate two different members by means of said rollback or cam arm when said cylinder is actuated by one key, whereas said rollback or cam arm is operative on only one of said members when another key is'used. By this arrangement, one rollback or cam arm is adapted to do the workwhich in manycases has been done by two rollbacksv or cam arms, and the construction and operation of the lock are therefore simplified.

Another object of the invention is to improve the general construction of'locks of the class to which the invention relates.

To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings,

Figure 1 is a front. elevation of a mortise lock embodying my improvements, with the cap plate removed, the parts being in the normal position;

Fig. 2 is a view of the upper part of the lock, showing the latch bolt retracted by means of the change key;

Fig. 3 shows the upper part of the lock, with the rollbackturned' by the emergency ke to protraet the bolt;

Fig. 4 is a section on line 4-4 of Fig. 1, showing the change key inserted into the cylinder;

Fig. 5 is a similar view, showing the emergency key inserted into the cylinder;

bolt 11 adapted tobe retracted by a knob shoe 12, cooperating with the usual inside and outside hubs 13, 14. Above the latch bolt 11 is mounted a dead bolt 15 adapted to protrude through the faceplate 15*. This dead bolt has pivoted thereto a tumbler 16, with a loop 17 and a projection 18 on the loop extending between talons 19 on the lower part of the dead bolt, and adapted to be engaged by the wing 20 of a thumb turn hub 21. The arrangement is such that the dead bolt may be protracted by rotating the thumb turn hub in a clockwise direction with respect to Fig. 1. The projection 18 on the tumbler loop is at the lower part of the loop, and at the upper part thereof is a similar projection 22 extending between talons 23 on the upper part of the bolt. The tumbler 16 is provided with a lug 24 cooperating with a racking post or fence 25 on the back of'the case, whereby the bolt is locked in the advanced position or the retracted position.

A cylinder lock 26 is secured in an opening in the lock case at the outside of the door, and is adapted to be operated by a plurality of keys, including a guest or change key 27 (Fig. 4), and an emergency key 28 (Fig. 5). This cylinder lock is provided with a rollback or cam arm 29 which is rotatable in a single plane only, which plane is the plane of the talons 23 of the dead bolt. The rollback is adapted to enter between the talons 23 and engage the projection 22 of the tumbler for the purpose of actuating the bolt 15. The rollback is also adapted to retract the latch bolt 11 when the dead bolt is in the retracted position. For this purpose, the dead bolt carries a latch retracting lever 30, pivoted on said bolt at 31, and having a free end 32 adapted to rest on the upper edge of a main latch retracting lever 33, pivoted in the case at 34. This latch retracting lever 33 has a downwardly extending arm 35, cooperating with a cross head 36 on the latch bolt stem in the usual manner. The latch bolt may be retracted when the dead bolt is in the retracted position by turning the rollback 29 into contact with the free end of lever 30, which thereby actuates the main latch retracting lever 33, as shown in Fig. 2. In operating the lever 30, the rollback 29 abuts a projection on the end portion 32 of lever 30, which projection is in the plane of the talons 23 and of the rollback.

The cylinder lock 26 in the example shown has the usual case 38 and face plate or escutcheon 39. A key plug 40 is rotatable in the case 38 and is controlled by the usual pin tumblers 41. The rollback 29 previously mentioned is carried by the rear end portion of the key plug 40, but is radially movable thereon. The rear end portion of the key plug is reduced so as to present an extension 42 of generally rectangular cross-section, as shown in Fig. 7. Over this reduced extension 42 and against a shoulder 43 on the main part of the key plug is fitted a member 44 in the shape of a disk which is provided with small perforations 45 registering with screw openings in the key plug. The rollback 29 is of more or less usual configuration, but instead of being fixed against movement on the key plug, it is mounted to slide on the extension 42. For this purpose, the front or forward face of the rollback 29 is provided with a guide groove 46 engaging the extension 42, and at the sides of the groove 46 are vertically directed slots 47 which provide clearance for small screws 48, by means of which the rollback is secured to the key plug. Each of these screws 48 passes through one of the slots 47, thence through one of the openings 45 in the member 44, and then engages the threads of tapped opening or socket in the key plug itself. By providing the slots 47, the rollback 29 is permitted to move radially relatively to the key plug on the extension 42 from the position shown in Fig. 1 to that shown in Fig. 3. This rollback, however, is normally held in the position shown in Fig. 1 relatively to the key plug by means of a small spring 49, which is connected at one end to a projection 50 on the member 44, and at the other end to a pin 51 on the outer part of the rollback arm. This spring 49 is accommodated in a suitable socket 52 on the forward or front face of the rollback, as shown in Figs. 6 and 8 The spring 49 normally holds the rollback in the position shown in Fig. 6, with the upper ends of the slots 47 in abutment with the shanks of the screws 48. The rollback is provided with a notch 53 at its lower part, which notch enters the same from the bottom, and is located in the back wall of the guide groove 46. The notch does not extend as high as the top of the key way 54, and its upper edge 55 presents an abutment adapted to be engaged by the emergency key 28. hen the emergency key is inserted, its beveled rear end engages the top edge 55 of the notch 53, and the rollback 29 is thereby raised to the position shown in Fig. 5, its outer end being moved radially outward relatively to the key plug so that said outer end will describe a larger circle when this key is rotated than it does in the case when the change key 27 is rotated. The change key 27 is shorter than the emergency key, and does not engage the notch 53; consequently, the rollback is not displaced radially the change key, and the outer end thereof turns in a smaller circle than it does when said rollback is actuated by the emergency key. When the emergency key 28 is withdrawn, the spring 49 restores the rollback to its normal position, but in some cases the spring can be omitted, because the rollback will return to its normal position by gravity.

When the parts are in the position shown in Fig. 1, the latch bolt can be retracted by either of the keys 27, 28 by inserting such key and turning in a counter-clockwise direction. While the emergency key turns the rollback in a larger circle than does the change key, in any event the cam will be turned into engagement with the latch retracting lever for the purpose of operating the same and retracting the latch by means of the lever 33, as previously explained. On the other hand, the dead bolt 15 can only be protracted and retracted by means of the emergency key. When the change key is inserted and turned in a clockwise direction with respect to Fig. 2, the rollback 29 will not reach down far enough to actuate the tumbler 16, and consequently said rollback will take up against the talon 23 nearest to the face plate of the lock, and this talon will block further movement thereof, as indicated by the dotted lines in Fig. 2. The emergency key, however, will readily protract and retract the dead bolt because it moves the roll bolt 29 radially outward to a position in which it will properly engage the talons, as shown in Fig. 3. The emergency key will protract the dead bolt, and then retract it, and then on continued movement of said rollback after the dead bolt has been retracted, it will abut against and operate the lever 30 of the latch mechanism and thereby re tract the latch. The change key cannot operate on the latch bolt when the dead bolt has been protracted, for it is first necessary to retract the dead bolt to bring the lever 30 into an operative position, and this can only be done by the emergency key.

It will be understood that by my invention, two members of amortise lock mechanism, for example, the members 15 and 30 may both be actuated by a single rollback, such as 29, when said rollback is displaced radially relatively to the key plu by one key; whereas only one of the mem ers, for example, the member 30, may be actuated by said rollback when it occupies its normal position relatively to the key plug.

The appended claims are limited to the construction of the cylinder lock per 86 as p the combination of the mortise lock mechanism with the cylinder lock is claimed in the Patent No. 1,244,264 previously mentioned.

What I claim is: p

1. A cylinder lock having a casing a key plug rotatable therein, said key plug having a reduced extension at the rear of the cylinder look, a rollback guided on said extension radially with respect to the key plug and embracing said reduced extension, and screws for securin said rollback on said key plug, the former I eing provided with slots through which said screws pass in order to permit the necessary radial movement of the rollback; substantially as described.

2. A cylinder lock having a casing, a key plug rotatable therein having a projecting inner end, and a rollback slidably mounted upon the inner face of said key plug, said rollback havin a groove formed in its inner face for slidably receiving and inclosing the projecting inner end of said key plug; sub stantially as described.

3. A cylinder lock having a casing, a key plug rotatable therein, a rollback mounted upon the inner face of said key plug and slidable radially thereon with respect to the key plug, said rollback being slotted and securing means passing through said slots for slidably securing said rollback upon the inner face of said key lug; substantially as described.

4. A cylinder lock having a casing, a key plug rotatable therein, said key plu having a reduced extension at the rear of t e cylinder look, a disk member mounted upon said reduced extension and having an opening formed therethrough to receive said extension, a rollback slidably mounted upon the inner face of said key plug and having a groove formed in its inner face for slidably receiving said extension, said extension and groove constructed to prevent relative rotation therebetween, and a spring operatively connected to said disk member and rollback for returning said rollback to its normal position; substantially as described.

5. A cylinder lock having a casing, a key plug rotatable therein, said key plug having a reduced extension at the rear of the cylinder look, a rollback slidably mounted upon the inner face of said key plug, said rollback having slots formed therein and screws extending through said slots for slidably securing the rollback to the key plug, said rollback provided also with a groove constructed to slidably but non-rotatably receive said reduced extension to prevent relative rotation between said rollback and key plug; substantially as described.

In witness whereof, I have hereunto set my hand on the 12th day of Sept, 1917.

HENRY G. VOIGHT.

copies of this patent may be obtained for flve cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

